50051551506665 has 16 divisors (see below), whose sum is σ = 60077799565200. Its totient is φ = 40030617403392.

The previous prime is 50051551506637. The next prime is 50051551506727. The reversal of 50051551506665 is 56660515515005.

It can be written as a sum of positive squares in 8 ways, for example, as 5468474679529 + 44583076827136 = 2338477^2 + 6677056^2 .

It is a cyclic number.

It is not a de Polignac number, because 50051551506665 - 2⁸ = 50051551506409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324071981 + ... + 324226389.

It is an arithmetic number, because the mean of its divisors is an integer number (3754862472825).

Almost surely, 2^{50051551506665} is an apocalyptic number.

It is an amenable number.

50051551506665 is a deficient number, since it is larger than the sum of its proper divisors (10026248058535).

50051551506665 is a wasteful number, since it uses less digits than its factorization.

50051551506665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171196.

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 50051551506665 in words is "fifty trillion, fifty-one billion, five hundred fifty-one million, five hundred six thousand, six hundred sixty-five".